Over 26 weeks (182 days) teams play 162 games. As almost no DH are ever scheduled, that leaves 20 off days, 3 of which come at the ASB.

As such, except for the two teams that play on Sunday night to open the season, each team gets 17 off days during the 26 weeks. Since everyone plays Fr-Su and almost always Tu-We, these 17 days usually come Mo and Th.

Therefore, most every team is scheduled to play 35 of the 52 Mo or Th (with rare exceptions). So, no team plays every Mo and Th possible, although I don't know the breakdown of whether some teams have all of their off days on either Mo or Th. I doubt it, though.

SO FROM LOOKING AT THIS: I have to think it could play out to your advantage to use this data if it would really make a difference - but you'd have to have no inning limit to really use (head to head leagues)

By the way I did this in excel in less than 10 minutes so I'm not promising the results are 100% accurate.